Apparatus for trimming and perforating sheet-metal packs



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De. 30," I924. 152M312 P. NELSON 'APPARATUS FOR TRIMMING PERFORATING SHEET METAL PACKS Filed Nov. 24, 1925 6 sheet s sheet 1 Dgc, 39, 1924.

P. NELSON 6 Sheets- Sheet 2 Filed Nov. 24

ATT [3 P1 NEE P. NELSON APPARATUS FOKTRIMMING AND PERFORATING SHEET METAL PACKS :kDec. 30, 1924. 3 152x312 Filed Nov.' 24 1925 e She'ets She,et s

Dec. 30, 1924 I P. NELSON APPARATUS FOR TRIMMING AND PEREORATING SHEET METAL PAdKS .6=Sheets-Sheet 4 M 1mg INVENT DR ATTE] H llE Z.

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P. NELsDN APPARATUS FOR TRIMMING AND PERFORA'IING SHEET METAL PACKS 1923 e Sheets-Shes 5' Dec. 36, '?24. 3,521,312

F. NELSON APPARATUS FOR TRIMMING AND PERFORATING SHEET METAL PACKS Filed Nov; 24, 1923 6 Sheecs$heet s Patent Dec. so, ieaa PAUL NELSON, or moaeen'rown, WEST VIRGINIA, nssmhoa or FORTX-FIVE oun- .nonnnnnms 'IQ mas. Games Ann run onn-nuunnnn'rns 'ro enemas J. MUR- PHY, BOTH or" mean-us FERRY, OHIO.

MP1. 'EUS FOE TRIM'HING AND PEEFORATING SHEET-METAL PACKS.

Application filed November 24, 1923. Serial No. 676,728.

Perforating Sheet-Metal Packs, of which the following isqa specification.

This invention relates to mechanism trimming the ends of metal sheets and packd' preparatory to doubling in the rolling process.

The primary object of the invention is to provide an apparatus whereby, in the process of pack-rolling metal sheets, the sheet or pack is trimmed following each rolling of the metal to the elongation required for doubling, and whereby, at thesam e'ti-ine, a line ofpartial severance is produced-in the sheet or pack for facilitating thcdeubling "pack as it appears following the second operation. I

The packrolling of sheets, as hitherto performed, involves, first, the breaking down of the sheet bars to an elongation which, while varying considerably, is ordinarily about six hundred per cent :of the length of the bar. The sheets are then paired, reheated, and again rolled for'fun.

ther elongation, after which they are doubled. The pack is then subjected to a final reheating, after which it is rolled to a final required elongation. In carrying out this prevailing method, the first reheating is rendered necessary only because of the fact that if rolling of the metal in the first rolling 'operation were continued to effect the elongation which is effected in the second rolling operation, which the temperature of the metal would readily permit,the

metal would then be too cold to admit of its being doubled by ordinary means.

An object of the present invention is to provide a mechanism which, following elongation of sheets in a single rolling operation to the extent heretofore effected in the second operation, acts to weaken the sheets along the transverse center line thereof so that doubling of the sheets at their then low temperature may readily be effected.

A. further object is to provide an apparatus of the character mentioned by which packs are readily introduced in position t be trimmed.

With these and other objects in view, the

invention resides-in the features of construction, arrangement of parts and combinations of elements which will hereinafter be described, reference being had to the accompanying drawings, in wluclr- Figure 1 is a front sideelevation of the invention;

Figure 2 is an end elevation of the same; Figure 3 is a partial central transverse section, showing one of the pack perforatingsheam, parts of the mechanism being omitted;

Figure 4 is adetail vertical section of the shears shown in 3;

Figure 5 is a plan view of the pack as it appears following the first trimming and perforating operation;

Figure 6 is a similar view, showing the trimming and perforating operation;

Figures 7 and S are plan and vertical sectional views, respectively, of the InOV-.'

able blade of the shear employed in the first perforating operation;

Figures 9 and 10 are similar views of the stationary blade of said shear;

Figures 11 and 12 are similar views of the movable blade or". the shear employed in V the second perforating operation;

Figures 13 and 14 are similar views of the stationary blade ofthc last mentioned shear; i

Figures 15 and are enlarged vertical sectional views of the upper and lower blades, respectively, employed in producing short alined perforations or slits;

Figure 17 is an enlarged fragmentary view of a sheet, showing the perforations produced by the blades shown in Figs. 15

and 16;

Figures 18 and 19 are vertical sectional views of modified forms of upper and lower shear blades; H

Figure 20 is a View similar to Fig. 17, showing the slits produced by the blades shown in Figs. 18 and 19;

Figure 21 is a view of the invention partially in top plan andpartiall'y in. horizontal section, with parts omitted, showing the pack in the position to which it is automatically shifted following trimming thereof; and

Figure 22 is a transverse section on line 22-22, Fi 1, with parts omitted, showing side members 5adjacent to each of the opposite ends of the latter is a transverse shaft 9, and mounted upon said shaft adjacent to each of its opposlte ends is theupper end of a crank 10 which has ivoted to its lower end the upper end of a link 11. The lower ends of the-links of each pair have pivotallyof which packs posltione machlne may be moved into operative posiattached thereto lugs 12 fixed upon the opposite end portions of the movable member or blade 13 of a shear designed to act upon the adjacent end of a sheet metal pack for trimming said end. Said blade 13, which cooperates with a fixed blade 14 located direct y beneath the end portion of the pack when the latter is properly positioned, is

vertically movable in suitable guides, as in slots 15 provided therefor in parallel bars 16 which are loosely mounted at their upper elndfst upon and depend from the adjacent s a Journaled in suitable bearings, as 17 carstantially midway between the ends of the frame, is a transverse shaft 18 which has fixed thereon adjacent to each of its opposite ends a crank-arm or disk, as the d, '1: 19, to which is pivoted, as to a wrist pin 20' located eccentrically with respect to the axis of the shaft, the upper end of a depending bar 21, said bar being adapted to be deg pressed for actuating the movable member. or blade of one or the other of two shears as and for a purpos which will hereinafter be explained. Sal movable shear 'me'ni as, herein designated 22 and 23, are dis osedfor sliding movement in suitable guides, as in guide slots 24 and 25 .provi'ded!'herefor,"' in stationary upright bars 26 an 27 ca ried b theframe; Said movable members 22 an 23. are; igned to cooper-a ,respec tivel with stationary transverse shear mem era 28 and 29 located directly beneath the middle portion of the pack of sheets when the latter occupies properly placed po: sition with respect to the machine.

Journaled in bearings 30 occupying 'suitably located positions, as on the side memhere 1 of the-baseportion of the frame, intervto be hereinafter explained.

mediate the middle airs of shears and each of the end pairs 0 shears is a, transverse shaft 31 having thereon rollers 32 which under-lie and support the inner end of a 1011- gitudi'nally shiftable table member 33 which as its upper face dis osed approximatel I, in the plane of the level of the mill floor The outer end of each table member 33 hai 3 hinge-like connection with the lower end portion of the adjacent shear carrying bars;

16'. Thus, said table members move outward and inward, traveling upon their supporting rollers 32, as said bars are swung outward and .inward as and fora purpose Dis osed for travel in transversely 'arran e leve as in channels 36 provided in the bot tom of the pit 3 and extending through the mill floor to an appropriate distance in front of the frame of the machine, are slidable bars 37. Carried by the outer end portions of said bars 37 are pack pushers by means tion with respect to the various shears. While said two pushers may be of any other appropriate form, those herein shown for illustrative urposes consist of oneiece resilient meta bars 38 attached to t e outer ends of said "bars 37. Each bar 38 inclines u ward andinward toward the front side guides 35 located below the floor in front of the o the frame of the machine'and normally presents an inwardly facing shoulder38 10' cated slightly above the floor level and adapt ed tolie in abuttingenga ement with'the outer lateral edge of the s eet metal pack which is to be entered in the machine. In

ward sliding movement of the slidingbars 37 following the placing of a pack in" osi tion onthe floor in front of the mac line frame, actuates the pnsher bars 38 to engage and force saidpack gnward to proper position uponthe tablefmembers 33; Such inward sliding movement of the bars 37 is ef- .return movement.

Coil-springs 45' serve to yieldingly supa fected by any suitable means, as by lever" in which is enport the movable blades 13 of the opposite end shears in elevated position, each of said springs be'mg attached at one end to a substantially ilpright arm 46 fixed upon the adjacent shaft 9 and at its opposite end to a suitably located stationary part, as to a brackets? carried by the frame. Actuation of said blades 13 is efi'ected against the tension of said springs by power mechanism which includes a power cylinder 48, either operated by steam or compressed air,' which has the outer end of its piston qu'cntly, to actuate the movable blades 13 which are suspended from said crank arms to move downward into cooperative relation to thefixed blades 14 for shearing oil, or trimming, the ends of the pack.

Each of the shafts 9 has fixed thereon the outer ends of two convergently related arms 52, which carry upon-their meeting inner ends agear: segment 53, the opposing segments being disposed in meshing relation,

as shown in Fig. 1, Thus, rotary movement imparted to one of. the shafts 9 in duces, throughthe intermediacy of said segments corresponding movement of the other ofsaid shafts, resulting in the maintenance of the opposite end shears at equaldistances from the center or middleof the packs upon which-they act.

The movable shear blades 22-and 23 are yieldingly supported at opposite ends by coil springs 54 and 55, respectively, attached to the stationary bars 26 and 27 with respect to which said members are slidable.

Each of said blades has therein holes or recesses 56 adapted for the reception of the adjacent ends of, pins 57 which are carried byand which have their op osite ends projecting on opposite sides of t e depending bars 21. In practice, but one of said blades 22 and 23 is actuated at a time according to the character of the perforations to be formed in the middle portionof the pack. When the shear blade 23 is to be actuated, the bar-s21 are first thrust by means of a h'apd lever 58 to position in which their pins 57 seat in the recesses of said blade, following p I which said bars 21 are actuated by forward rotary movement of the shaft 18 to more. downward for thrusting said blade into cooperative relation to the stationary shear member or blade 29. Or, when the blade 22 is to be depressed, said lever 58 is drawn outward to dispose the pins 57 in the recess of said blade 22, which is then actuated downward as aforesaid. Recesses 59 and 60 provided in the under side of said lever 58 are engaged with a suitably located fixed pin, stud or rod 61 according as the blade 22 or the blade 23 is to be actuated.

The shear which includes blades 23 and 29 is located precisely midway between the laterally shift-able end shears and is designedto produce in the middle transverse line of the pack, simultaneously with the trimming of the opposite ends of the pack, a transverse line of narrow slits or perforations whereby the resistance to dou bling of the pack along said middle line is overcome to the extent that such pack may be readily doubled by hand even when cold. While various forms of such slits and perforations may be employed, it is at present preferred that slits 62 extend into the pack from each of its opposite lateral edges a distance of from one fourth to one-third the width of said pack, and that a line of shorter slits 63 be formed intermediate said slits 62, as shown in Fig. 5.

Following doubling of the pack, the latter is reheated and subjected to further rolling which "results in elongation of the pack to the extent that a second doubling is required. As a preliminary to such second doubling, the pack is reintroduced in the machine in a position in which its opposite ends are trimmed and a line of perforations, as 64, Fig. 6, is cut across the transverse center line of the pack by the actuation of shear-blade 22. The weakening of the pack which results from the provision of such perforations provides for com )a.rutively easy doubling.

As is obvious, various forms of slits or perforations other than those hereinbeforc specifically mentioned may be employed through the provision of different forms of shear blades. as the short straight slits 65.

Fig. 17 produced by cooperating blades 66 and 67, respectively, shown in Figs. 15 and 16,, or the slits 68 having at opposite ends Short angularly disposed terminals .38. Fig.

20, produced by cooperating blades 69 and 70, respectively. shown in Figs. 18 and 19.

For facilitating the proper positioning of the pack, suitable upright stops,'as 71, may be positioned as gauges in any of a series of holes 72 provided therefor in the outer end portions of the table members 33.

Following the pack shearing and perforating operation, the movable blade of the I erforating shear is elevated to normal position by the thereto-attached springs, and the opposite end shears resume their normal positions, being actuated by the tension springs 45 and the weight of certain of the suspended parts, assisted if and when necessary by power applied by hand, as through a lever 73 pivoted at a convenie1 1t point on the frame and having connection through .a

pivotedijlink 74 with-one of the ear segments 53. Additionally, a weight 7 maybe provided .:onthe end of an upwardl inv clined ar1n7 8fixed on the shaft 18, as s own' ,in Fig. 1, for assistin'ginf restoring parts of the mechanism to normal I ositions, Upon Itheureleas'e'I of. the and lever 43 from the retaining member 44, the wei ht of the de ending lever 39 suflices-to slide the bars' 3 their outwardly thrust posidiagonal position shown in Fig. 21, in which gagement with the pack.

position said pack may be conveniently grasped by a workman for effecting withdrawal of the pack from the machine. It will of course be understood that in entering the pack,.the dog 76 and lever 75 are thrust rearward and remain in such position until the pusher bars 38 are withdrawn from en- I have herein illustrated my invention in what I consider to be its simplest form. It

will be ap rent, however, that various mere mechanica changes in the form and arrangement of some of the parts may readily suggest themselves to persons skilled in the art. I do not therefore desire to limit my selfexcept as ma be requiredby a iair interpretation of t e appended claims. What is claimed is 1. Mechanism for trimming and perforating sheet metal packs, comprising two relatively shiftable pairs" of end trimming shears, selective means-qfor' producing a transverse hne of perforations midway between the ends of the pack to facilitate doubling, and power mechanism for simultaneously actuating said shears and the selengths.

lected perforating means; v

2. Mechanism for trimming and perforating sheet metal packs, comprising end-- trimming shears, two independent perforating devices arrangedr'substantially midway bet-ween said shears, rotary devices whereby said perforating means are actuated selectively, and means intermediate said rotary means and said shears whereby the. latter are actuated simultaneously with the selected perforating .device, andmeans, whereby said rshears may be shifted rela-j tively for trimming packs of different 3. Mechanism for trimming andperforating sheet metal packs, compris ng enddifierent lengths.

4.- Mechamsm for trimming andpe i ranged substantially midway 'betwee ranged substantially midway between said -shears,'rotary means ,whereby said perforatmg means are actuated'g -mean's intermediate said'rotarymeansfa aid shears whereby the latter ar lac'tuated simultaneously wit said periorating means;- m'eans normally holding said shears in arallel relation, and means for relatively shifting saidflshears to position the latter for trimming packs of in sheetmetal packs, comprising trimming shears, perforating means at shears, rotary means'j'iwhereby ng means are actuated, means-mterme said rotary means and said shearsg wherebiyg;

the latter are .actuatedjsimultanepuslywit said perforating" means, means" nqifi ally holding said shears in parallelrelation, a means for relatively shifting said, -shears"to and position the latter for trimming packs-of iflerent lengths, said I shifting means 'including means whereby shiftlng' of said shears is effected' simultaneously and throughout corresponding distances.

' 5. Mechanism for trimming and perfoi'ating sheet-metal packs comprising a frame, two pairs of shears located adjacent the opposite ends of said frame, each pair of said shears consisting of ga stationary member and a member reciproeableqelative to said stationary-. member, reIativs1y.-* shiftable members rocable shear-members, means for shifting I said massa shear 'member'sland form hgguidesim sa d rec1p-.

said shiftable memberjgvhenebv they areactuated simultaneouslivi1"throughout corref I spondin distanceapac interln iate ish'ears andggmeans for simultaneously actuating said shears and said firforating devices. 1

rating sheet-metal I frame, two pairs of s ears locate "ad acent acks com rising Fa the opposite-ends of said frame, each pair ofsaid shears-consisting of a stationary meme.

crating devices ber and'a member recipr cable relative" said stationary member, relatively shiftablen' members carrying said stationary shear members and forming guides for sand recip rocable shear members, means for shiftin said shiftable members, means interpose between said shiftable members whereby they are actuated simultaneously throughout corresponding distances, two independent ack perforatingv I devices located interme iate said pair-of shears, each including a reciprocable member, an element arranged to engage said devices selectively, poweroperated means for actuating said elementto depress the selecteddevice for perforatin the ,pack, and means intermediate" sai power operated means and the reciprocable" trimming shears, perforating means armember'of each pair of shears wherebythe latter is actuated for efiectingtrimming of the ends of the pack simultaneously with the perforation thereof.

'7. Mechanism for trlmmlng and perforating sheet-metal packs comprising a frame,

two pairs of-shears located adjacent'the op; posite ends of said frame,-each pair of said'. shears consisting of a,',stationary member and :1 member reciprocable relative to said sta tionary member, relatively'shiftablememq;

hers carrying said stationary shear members and forming guides for said reciprocable shear members, shiftable members, means interposed be tween said shittable members whereby they:

are actuated simultaneously throughout corresponding distances, pack supporting-devices connected to and shiftable with saidshiftable members, a pack perforating device arranged intermediate said shears, and power actuated mechanism 'whereby; said shears and said perforating device are simultaneously actuated.

' 8; Mechanism for trimming and perforat ing' sheet metal'pack's comprising a. frame;

two pair oi shears locate dadjacent the opposite ends of said frame, eachflpair of said shears consist ng. of a stationary member and amember 'reciprocable relative to said stationary. member,- relative shiftable members carryin g1 said. stationary shear members and, forming guides for said reciprocable shear members, =means for shifting said shiftable member, means interposed be; tween said shiftable member whereby they are actuated simultaneously throughoutcorresponding distances, pack supporting; devices connected' to-and shiftable with said means for shifting said shiftable members, a pack perforating device arranged intermediate sald shears,

power -a.ctuated"mcchanism whereby said shears and said perforating device are simultaneously actuated, and means for shifting packs to position upon said supporting de-' vices. e i

9,. Mechanism two pairs of shears located ad'acent the'op zpositeends of said frame, each pair of said shears consisting of a stationary member 'andaa memberl reciprocable relative to said stationary member, 1.,relatively shiftable Tmembers: carrying said stationary shear members and fOrmin f guides forsaid reciproc'able' shear mem ers, means for shiftvice aresimultaneously actuated, means for shifting'packs to position upon said supfor trimming and perforatling'sheet metal packs-comprising a frame,

porting devices, and means for automaticaI-' 1y imparting an initial removing movement In testimony whereof, I afiix my sigma-17 ture in presence/of two subscribing w tto the pack following-trimming, thereof.

*nesses. A, a

- v PAUL NELSON; Witnesses: v

M; TrMamon, p Dunmr. 

